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Math Help - Trig triangle word problem

  1. #1
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    Trig triangle word problem

    From a point on level ground, the angle of elevation to the top of a vertical building is a. From the point d feet further away from the building on level ground and in line with the building and the first point, the angle of elevation of to the top of the building is B. Express the height of the building in terms of a, b and d.
    help! I'm not sure how to draw the angles of elevation.
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  2. #2
    MHF Contributor Unknown008's Avatar
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    Maybe this sketch will help you:

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